Comment RSS and Post Titles

Currently the feed at https://www.poeticgeek.net/comments/feed/rss2/ (comments_rss2_url) which I believe is produced by wp-commentsrss2.php does not include the post name to which the comment was made.
I tried changing:
<title>by: <?php comment_author_rss() ></title>
To:
<title>Comment on <?php the_title() ?> by: <?php comment_author_rss() ?></title>
Unfortnuately this produces a feed with every title “Comment on [title of most recent post] by …”
Is there any way to get this to pull the actual post data for which the comment is on? Or will it always have the data from the most recent post?